n.浮球控制安全阀 float-operated relief valve: 浮球控制安全阀float operated valve: 浮波阀; 浮筒司动阀float-operated valve: 浮动阀; 浮球阀direct-operated relief valve: 直接作用式安全阀flat-operated relief valve: 浮筒操纵安全阀下载手机词典可随时随地查词查翻译